The skill checks in this are no joke, and my players got lucky several times where they passed by the skin of their teeth, or that they randomly did have a point in a skill (like a monk who had a point in perform (comedy) because he was based on Jackie Chan). But, there's well written consequences on failing skill checks.
As a GM, you should inform the players ahead of time that this scenario is really encouraged for characters who are lawful good, or at least within one step of lawful good. I imagine it'd go a lot worse for a group of all CN fighters.
As for the scenario itself, its well written and its clear that the author thought of a lot of the common ways that a group might handle something and then gave guidelines on how a GM should handle it. That's something that a lot of adventure writers could get better at.